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sbp-target: Initial merge of firewire/ieee-1394 target mode support

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The FireWire SBP-2 Target is a driver for using an IEEE-1394 connection
as a SCSI transport. This module uses the SCSI Target framework to
expose LUNs to other machines attached to a FireWire bus, in effect
acting as a FireWire hard disk similar to FireWire Target Disk mode
on many Apple computers.

This commit contains the squashed pull from Chris Boot's SBP-2-Target:

      https://github.com/bootc/Linux-SBP-2-Target.git patch-v3

firewire-sbp-target: Add sbp_base.h header
firewire-sbp-target: Add sbp_configfs.c
firewire-sbp-target: Add sbp_fabric.{c,h}
firewire-sbp-target: Add sbp_management_agent.{c,h}
firewire-sbp-target: Add sbp_login.{c,h}
firewire-sbp-target: Add sbp_target_agent.{c,h}
firewire-sbp-target: Add sbp_scsi_cmnd.{c,h}
firewire-sbp-target: Add to target Kconfig and Makefile

Also add bootc's entry to the MAINTAINERS file.  Great work Chris !!

Signed-off-by: Chris Boot <bootc@bootc.net>
Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Chris Boot 2012-04-14 17:50:35 -07:00 committed by Nicholas Bellinger
parent fc5f80b152
commit a511ce3397
7 changed files with 2895 additions and 0 deletions
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9
MAINTAINERS
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@ -2754,6 +2754,15 @@ T: git git://git.alsa-project.org/alsa-kernel.git
S: Maintained
F: sound/firewire/
FIREWIRE SBP-2 TARGET
M: Chris Boot <bootc@bootc.net>
L: linux-scsi@vger.kernel.org
L: target-devel@vger.kernel.org
L: linux1394-devel@lists.sourceforge.net
T: git git://git.kernel.org/pub/scm/linux/kernel/git/nab/lio-core-2.6.git master
S: Maintained
F: drivers/target/sbp/
FIREWIRE SUBSYSTEM
M: Stefan Richter <stefanr@s5r6.in-berlin.de>
L: linux1394-devel@lists.sourceforge.net

1
drivers/target/Kconfig
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@ -32,5 +32,6 @@ config TCM_PSCSI
source "drivers/target/loopback/Kconfig"
source "drivers/target/tcm_fc/Kconfig"
source "drivers/target/iscsi/Kconfig"
source "drivers/target/sbp/Kconfig"
endif

1
drivers/target/Makefile
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@ -25,3 +25,4 @@ obj-$(CONFIG_TCM_PSCSI) += target_core_pscsi.o
obj-$(CONFIG_LOOPBACK_TARGET) += loopback/
obj-$(CONFIG_TCM_FC) += tcm_fc/
obj-$(CONFIG_ISCSI_TARGET) += iscsi/
obj-$(CONFIG_SBP_TARGET) += sbp/

11
drivers/target/sbp/Kconfig Normal file
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@ -0,0 +1,11 @@
config SBP_TARGET
tristate "FireWire SBP-2 fabric module"
depends on FIREWIRE && EXPERIMENTAL
help
Say Y or M here to enable SCSI target functionality over FireWire.
This enables you to expose SCSI devices to other nodes on the FireWire
bus, for example hard disks. Similar to FireWire Target Disk mode on
many Apple computers.
To compile this driver as a module, say M here: The module will be
called sbp-target.

1
drivers/target/sbp/Makefile Normal file
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@ -0,0 +1 @@
obj-$(CONFIG_SBP_TARGET) += sbp_target.o

2621
drivers/target/sbp/sbp_target.c Normal file
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251
drivers/target/sbp/sbp_target.h Normal file
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@ -0,0 +1,251 @@
#ifndef _SBP_BASE_H
#define _SBP_BASE_H
#include <linux/firewire.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <target/target_core_base.h>
#define SBP_VERSION "v0.1"
#define SBP_NAMELEN 32
#define SBP_ORB_FETCH_SIZE 8
#define MANAGEMENT_AGENT_STATE_IDLE 0
#define MANAGEMENT_AGENT_STATE_BUSY 1
#define ORB_NOTIFY(v) (((v) >> 31) & 0x01)
#define ORB_REQUEST_FORMAT(v) (((v) >> 29) & 0x03)
#define MANAGEMENT_ORB_FUNCTION(v) (((v) >> 16) & 0x0f)
#define MANAGEMENT_ORB_FUNCTION_LOGIN 0x0
#define MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS 0x1
#define MANAGEMENT_ORB_FUNCTION_RECONNECT 0x3
#define MANAGEMENT_ORB_FUNCTION_SET_PASSWORD 0x4
#define MANAGEMENT_ORB_FUNCTION_LOGOUT 0x7
#define MANAGEMENT_ORB_FUNCTION_ABORT_TASK 0xb
#define MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET 0xc
#define MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET 0xe
#define MANAGEMENT_ORB_FUNCTION_TARGET_RESET 0xf
#define LOGIN_ORB_EXCLUSIVE(v) (((v) >> 28) & 0x01)
#define LOGIN_ORB_RESERVED(v) (((v) >> 24) & 0x0f)
#define LOGIN_ORB_RECONNECT(v) (((v) >> 20) & 0x0f)
#define LOGIN_ORB_LUN(v) (((v) >> 0) & 0xffff)
#define LOGIN_ORB_PASSWORD_LENGTH(v) (((v) >> 16) & 0xffff)
#define LOGIN_ORB_RESPONSE_LENGTH(v) (((v) >> 0) & 0xffff)
#define RECONNECT_ORB_LOGIN_ID(v) (((v) >> 0) & 0xffff)
#define LOGOUT_ORB_LOGIN_ID(v) (((v) >> 0) & 0xffff)
#define CMDBLK_ORB_DIRECTION(v) (((v) >> 27) & 0x01)
#define CMDBLK_ORB_SPEED(v) (((v) >> 24) & 0x07)
#define CMDBLK_ORB_MAX_PAYLOAD(v) (((v) >> 20) & 0x0f)
#define CMDBLK_ORB_PG_TBL_PRESENT(v) (((v) >> 19) & 0x01)
#define CMDBLK_ORB_PG_SIZE(v) (((v) >> 16) & 0x07)
#define CMDBLK_ORB_DATA_SIZE(v) (((v) >> 0) & 0xffff)
#define STATUS_BLOCK_SRC(v) (((v) & 0x03) << 30)
#define STATUS_BLOCK_RESP(v) (((v) & 0x03) << 28)
#define STATUS_BLOCK_DEAD(v) (((v) ? 1 : 0) << 27)
#define STATUS_BLOCK_LEN(v) (((v) & 0x07) << 24)
#define STATUS_BLOCK_SBP_STATUS(v) (((v) & 0xff) << 16)
#define STATUS_BLOCK_ORB_OFFSET_HIGH(v) (((v) & 0xffff) << 0)
#define STATUS_SRC_ORB_CONTINUING 0
#define STATUS_SRC_ORB_FINISHED 1
#define STATUS_SRC_UNSOLICITED 2
#define STATUS_RESP_REQUEST_COMPLETE 0
#define STATUS_RESP_TRANSPORT_FAILURE 1
#define STATUS_RESP_ILLEGAL_REQUEST 2
#define STATUS_RESP_VENDOR_DEPENDENT 3
#define SBP_STATUS_OK 0
#define SBP_STATUS_REQ_TYPE_NOTSUPP 1
#define SBP_STATUS_SPEED_NOTSUPP 2
#define SBP_STATUS_PAGE_SIZE_NOTSUPP 3
#define SBP_STATUS_ACCESS_DENIED 4
#define SBP_STATUS_LUN_NOTSUPP 5
#define SBP_STATUS_PAYLOAD_TOO_SMALL 6
/* 7 is reserved */
#define SBP_STATUS_RESOURCES_UNAVAIL 8
#define SBP_STATUS_FUNCTION_REJECTED 9
#define SBP_STATUS_LOGIN_ID_UNKNOWN 10
#define SBP_STATUS_DUMMY_ORB_COMPLETE 11
#define SBP_STATUS_REQUEST_ABORTED 12
#define SBP_STATUS_UNSPECIFIED_ERROR 0xff
#define AGENT_STATE_RESET 0
#define AGENT_STATE_ACTIVE 1
#define AGENT_STATE_SUSPENDED 2
#define AGENT_STATE_DEAD 3
struct sbp2_pointer {
__be32 high;
__be32 low;
};
struct sbp_command_block_orb {
struct sbp2_pointer next_orb;
struct sbp2_pointer data_descriptor;
__be32 misc;
u8 command_block[12];
};
struct sbp_page_table_entry {
__be16 segment_length;
__be16 segment_base_hi;
__be32 segment_base_lo;
};
struct sbp_management_orb {
struct sbp2_pointer ptr1;
struct sbp2_pointer ptr2;
__be32 misc;
__be32 length;
struct sbp2_pointer status_fifo;
};
struct sbp_status_block {
__be32 status;
__be32 orb_low;
u8 data[24];
};
struct sbp_login_response_block {
__be32 misc;
struct sbp2_pointer command_block_agent;
__be32 reconnect_hold;
};
struct sbp_login_descriptor {
struct sbp_session *sess;
struct list_head link;
struct se_lun *lun;
u64 status_fifo_addr;
int exclusive;
u16 login_id;
struct sbp_target_agent *tgt_agt;
};
struct sbp_session {
spinlock_t lock;
struct se_session *se_sess;
struct list_head login_list;
struct delayed_work maint_work;
u64 guid; /* login_owner_EUI_64 */
int node_id; /* login_owner_ID */
struct fw_card *card;
int generation;
int speed;
int reconnect_hold;
u64 reconnect_expires;
};
struct sbp_nacl {
/* Initiator EUI-64 */
u64 guid;
/* ASCII formatted GUID for SBP Initiator port */
char iport_name[SBP_NAMELEN];
/* Returned by sbp_make_nodeacl() */
struct se_node_acl se_node_acl;
};
struct sbp_tpg {
/* Target portal group tag for TCM */
u16 tport_tpgt;
/* Pointer back to sbp_tport */
struct sbp_tport *tport;
/* Returned by sbp_make_tpg() */
struct se_portal_group se_tpg;
};
struct sbp_tport {
/* Target Unit Identifier (EUI-64) */
u64 guid;
/* Target port name */
char tport_name[SBP_NAMELEN];
/* Returned by sbp_make_tport() */
struct se_wwn tport_wwn;
struct sbp_tpg *tpg;
/* FireWire unit directory */
struct fw_descriptor unit_directory;
/* SBP Management Agent */
struct sbp_management_agent *mgt_agt;
/* Parameters */
int enable;
s32 directory_id;
int mgt_orb_timeout;
int max_reconnect_timeout;
int max_logins_per_lun;
};
static inline u64 sbp2_pointer_to_addr(const struct sbp2_pointer *ptr)
{
return (u64)(be32_to_cpu(ptr->high) & 0x0000ffff) << 32 |
(be32_to_cpu(ptr->low) & 0xfffffffc);
}
static inline void addr_to_sbp2_pointer(u64 addr, struct sbp2_pointer *ptr)
{
ptr->high = cpu_to_be32(addr >> 32);
ptr->low = cpu_to_be32(addr);
}
struct sbp_target_agent {
spinlock_t lock;
struct fw_address_handler handler;
struct sbp_login_descriptor *login;
int state;
struct work_struct work;
u64 orb_pointer;
bool doorbell;
};
struct sbp_target_request {
struct sbp_login_descriptor *login;
u64 orb_pointer;
struct sbp_command_block_orb orb;
struct sbp_status_block status;
struct work_struct work;
struct se_cmd se_cmd;
struct sbp_page_table_entry *pg_tbl;
void *cmd_buf;
unsigned char sense_buf[TRANSPORT_SENSE_BUFFER];
};
struct sbp_management_agent {
spinlock_t lock;
struct sbp_tport *tport;
struct fw_address_handler handler;
int state;
struct work_struct work;
u64 orb_offset;
struct sbp_management_request *request;
};
struct sbp_management_request {
struct sbp_management_orb orb;
struct sbp_status_block status;
struct fw_card *card;
int generation;
int node_addr;
int speed;
};
#endif